{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["protein", "DNA", "RNA", "cell type", "cell line"], "input": "Cell culture experiments demonstrated that the natural variant with four Sp1 sites had a slightly higher promoter activity and viral replication rate than the isogenic control LTR with three Sp1 sites ."}
{"protein": ["Sp1"], "DNA": ["Sp1 sites", "isogenic control LTR"], "RNA": [], "cell type": [], "cell line": []}